Lifting-jack.



. L. BlLLiNGSLE-Y.

LIFTING JACK.

APPLICATION FILED JULY28.`|917.

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iran statins PERCY L. BILLINGSLEY, OF ORLANDO, FLORIDA, ASSIGNOR TO ATLAS MANUFACTURXNG- COMPANY 0F ORLANDO, OF ORLANDO, FLORIDA.

LIFTING-J' ACK.

Specification of Letters Patent.

Patented J une 11, ivre.

Applicationled July 28, 1917. .Serial No. 183,263.

To all whom it may concern.

Be it known that I, PERGY L. BILLINGSLEY, a citizen of the United States, residing at Orlando, inthe county of Orange and State of Florida, have invented certain new and useful Improvements in Lifting-Jacks; and I do hereby declare the following to be a full, clear,'and exact description of the iiivention, such as will enable others skilled in the art to which it-appertains to make and use the same.

My invention relates to lifting jacks, and more particularly to a jack for jacking up the parts of an automobile or like vehicle and which is capable of being readily collapsed into compact form wherein the jack may be conveniently carried in a tool box or kit of an automobile or like vehicle.

One of the objects of this invention is to provide a jack of this character provided `with novel means forA preventing lateral movements of the parts of the 'jack with re`- spect to its base, whereby to render stability to the jack and maintain its head in alined operative relation to the base of the jack.

Another object of this inventionis to provide the jack with means to limit the inward movement of its collapsible members at their central pivotal points so as to maintain theA pivotal points of the collapsible members in alinement with each othervwhen the jack is in set-up position so as to obviate the necessity for lifting the load uponthe jack before the jaclrcan be brought to collapsed position and thereby eliminate undue wear and strair upon the parts of the jack which would be the inevitable results if there were' not means provided to prevent such contingencies. v

Another objectv of this invention is to produce a lifting jack of this character which is simple in construction, durable, etiicient to accomplish the objects sought to be obtained, economical to manufacture, and constructed in a manner whereby the same may be.- readily and cheaply repaired.

4These and other objects and advantages will more fully appear as the nature of the invention is more clearly understood from the following description taken in connection with the accompanying drawings wherein there' is disclosed one embodiment of the invention, but which is susceptible to numerous variations and alterations in the form,

construction, and arrangement of the parts to meet the exigencies of the case without departing from the spirit of the invention or exceeding the scope of the claims.

Referring-to the accompanying drawings:

Figure 1 is aside elevation of the invention showing the same in set-u or extended position, certain of the parts ieing broken away.

Fig. 2 is a vertical sectional view on line 2 2 of Fig. l, showing further detail construction of the invention.

Fig is a vertical sectional view on line 3--3 of Fig.` 2, showing still further detail construction of the invention.

Referring to the drawings, `wherein similar reference characters denote corresponding parts throughout the several views, 1 denotes the base member, which may be formed of any suitable material but preferably metal, and suitably secured upon the base member l as by the bolts 2 or other suitable securing means are the attaching ianges -S`v'of the spaced and oppositely -disposed parallel side plates 4, provided adjacent. their upper edges with the pair `of spaced openings 5, the openings of one plate being in registration with the openings of the opposing plate.

Revolubly mounted in the registering openings 5 of the plates 4 are the trunnions 6 of the oppositely disposed blocks or substantial drums 7, provided upon their contiguous faces with the plurality -ofelongated -transversely disposed ribs or teeth 8 which are maintained in constant mesh with each other. The blocks or drums 7 are-positioned between -the side plates 4 and have formed thereon and between the adjacent ends of the blocks or drums 7 and the inner walls `of the sideJ plates 4 the non-circular shoulthe vblocks 14, one of the blocks 14, however being provided with internal right han screw threads and the other of the blocks 14 being provided with the internal left hand screw' threads 16. f Pivotally mounted upon the trunnions 13 of the blocks 14 and between the apertured ears 12 of the bars 11 and the blocks' 14 are the lower apertured ends 17 of the flanges 18 ofthe upper oppositely disposed collapsif .ble channel bars 19, the channel barsy 19 being formed of less width than the channel bars 11 so as to provide for the posltionmg of the lower apertured ends 17 of the bars 19 u on the trunnions 13 of the blocks 14 and tween the aperture'd ears 12 of th channel bars 11. The upper ends 2O of the flanges 18 of the upper channel bars 19 are provided with non-circular openings for `snugly embracing the non-circular shoulders 21 formed at the ends of the blocks or substantial drums 22 which are also provided with the trunnions 23 revolubly mounted in the spacedpairs of registering openings 24 formed in the oppositely disposed spaced parallel side plates 25 of the cap or head 26 of the jack. The conti uous faces of the oppositely disposed bloc s or drums 22 are `provided with the plurality of transversely disposed elongated teeth or ribs 27 which are maintained in constant mesh with each other. Upon the head 26 is suitabl secured the plate 28 which not only rein orces the I head 26 but provides an eiicient support for the object to be raised. 1ny order to reinforce the'toggle bars of the jacks the bars 11 are provided with the reinforcing plates 29 whichare secured to the backs of the bars through the medium of the rivets 30 or other suitable securing means, and to reinforce the bars 18 the same are provided .upon their backs with the reinforcing plates 31 'also secured to the bars 18 through the medium of the rivets' 32 or other sultable securing means.

For operating the toggle bars'11 and 19 toward and away from each other at their central pivotal points there is threaded through the blocks 14 the threaded rod' or bar 33 provided with the right hand threads 34 upon one-end portion thereof and the left f inwardly toward each other and beyond alinement with their extreme pivotal points aport1on of the threaded rod or bar 33 beneedles tween the adjacent ends of the 4threads'34 i and 35 is left blank and may also be enlarged at this point so as to provide the annular rib, collar or shoulder 37 and against which` i, the inner faces of the blocks 14 contact and thus provide a stop for preventing further inward movement of 'the central pivotal connections. of the toggle bars toward each' other. v The' operation of Ythe invention will be wf briey described as follows: 5

Assuming the jack to be in collapsed sition lwith its head substantially resting. l upon its base and the upper channel bars 19, g ifi seated within the lower channel 'barsl 11- which position can'be readily understood by the construction and manner of assembling the parts of the jack, and if it is desirable". to raise an object, the jack is positioned with its head beneath the object to be raised and the screw threaded bar or rod 33 is revvolved by any suitable wrench or tool in a manner for causing the right hand block 14 to move inwardly upon the threads34 and'.

the left hand block 14 to also move inwardly along the threads 35, whereby the object begin to be raised and if necessaryvthe ro 1 tating of the bar 33 may be continued until the inner faces of the blocks 14 contactv with the shoulder, collar or annular rib 37 Where by the rotation of the threaded bar 33 and the inward travel of the lblocks 14 thereon will be checked at the point lwhen the central pivotal points of the togglebars and their extreme pivotal points are in strict verti-y cal alinement and the jack in its greatest v extended position and. at the same time the l,

blocks being checked in their inward moves ment by the stop collar 37 the central pivotal points of the toggle bars will be prevented from passing inwardly beyond their vertical tot'V alinement with their extreme pivotal points and thereby lowering the head of the'jach in such a manner as to require the raising 11@ or lifting of the load or weight or object before the toggle bars can be moved out-4 wardlyv from each other at their central pivotal points by the reverse rotating of the' threaded bar 33 and thus eliminate yannee Y essary strain upon the parts of the jacht4 as well as wear and tear upon the threadsoi the blocks 14 and the threads of the bar 33,

'and in the operation of the device the llovvery i y' end of the bars 11 and the upper ends ot theA 1 bars 19 will swing in the plates 4 of the base and the plates 25 of the head by having their non-circular apertured ends snugly engaging the non-circular shoulders 9 and 21 of the blocks or druins 7 and 22 which have. their trunnions 6 and 23 revolubly mounted in the openings 5 and 24 of the base and head reof the oppositely :disposed blocks or drums 7 and 22 providedmith the transversely mg., posed elongated teeth or, ribs 8 and-27 reia@ l spectively of the jack, and by the provision iaeaiea from its operative relation with the base in any lateral direction and by employing the channel bars l1 and 19 instead of flat links the stability of the jack is rendered more certain and eiiicient.

The respective parts of the jack may be formed of any suitable material preferably metal, but I preferably form the bars 11 and 19 from plates of steel or iron by stamping the metal to the shape shown in the drawings, that is, channel shape or substantially Ushape in cross'section so as to provide these bars with suicient rigidity for sustaining heavyweights and at the same time to be possessed of lightness of weight and being of angular" formation and operating in conjunction with the toothed or ribbed drums eiiiciently prevents swaging of the jack.

Having described my invention, what l claim as new and desire to secure by Letters Patent, is

1. A jack of the character specified, comprising a base, a head, connecting members between saidbase'andsaid head, means for actuating said connecting members for moving said head to and from said base, and removable intercoacting means separate from but coperating withv said connecting members to maintain' uniform movement o said connecting members. i

2. In a jack embodying a supporting base, two pairs of members pivoted together to .form a parallelogram, a head at the top connected to the upper pair of members, means for directly forcing said members to and from each other to raise and lower said head, and removable gear members interposed between the pairs of members at the top and, bottom to cause each pair of me bers to simultaneously partake of each others movement.

A device of the character specified, comprising a base provided with spaced Bange members, a head provided with spaced rdange members, upper and lower channel bars connecting the flange members of said base and said head, means for pivotally connecting said channel bars* together, means for drawing said channel bars'toward and away from each other for moving said head toward and away from said base, removable gear, means rotatably mounted upon said base and upon said head and removably but nonrotatably connected with the upper and y lower ends ci said channel bars for preventing movement of said head out ofoperative vertical aiinement with said base, and means for reventin" the inward movement of .said

- channel bars toward each. other beycnda predetermined point. Y

. A devicevo the character specled, comsaid blocks toward each other for preventingl meshing teeth upon the contiguous faces of 'i0 each pair of drums, lower channel bars having their lower ends mounted upon the drums within said base member, upper channel bars having their upper ends mounted upon the drums within said head, means for pivotally connecting the adjacent ends of said lower and said upper channel bars, means for drawing said channel bars toward and away from each other for moving said head toward Aand away from said base, and means for preventing the inward movement of saidchannel bars toward each other beyond a predetermined point.

5. Adevice of the character specified,com prising a base member, a head, a co-acting 85 pair of drums revolubly mounted in said base, aco-acting pair of drums revolubly mounted in said head, a plurality of intermeshing teeth upon the contiguous faces of each pairv of drums, lower channel bars having their lower ends mounted upon the drums within said base member, upper channel bars having their upper ends mounted upon the drums within said head, internally screw threaded blocks having trunnions for pivotally connecting together the adjacent ends of said channel bars, a threaded rod engag- A ing the internal threads of said blocks for drawing said blocks and said channel bars toward and away from each other for op eratively moving said head relative to said base, and a collar upon said screw threaded rod for limiting the inward movements of the movement of said channel bars inwardly beyond a predetermined point.

6.' A device of the character specied, comf prising a base member, a head, a co-acting pair of drums revolubly mountedin said base, a co-acting pair of drums revolubly mounted in said head, a, 'plurality of intermeshing teeth upon the contiguous faces of veach pair of drums, non-circularshoulders l upon leach of said drums, 'lower channel bars having their. lower ends mounted upon said non-circular shoulders of said lower drums, upper channel bars having their upper ends mounted' upon the non-circular shoulders olsaid upper drums, means for pivotally connecting the adjacent ends of said lower vand said upper channel bars, means for connecting members ioi7- said base member 13@ and said head, and means for operating the meeting ends of seid connecting members for moving said head relative to said base member; with coperating drums revolubly mounted in said base member and said head and having non-circular intertting connes tions with seid Connecting members for pivotelly mounting said connect-ing membels upon Seid base member and said head and for causing simultaneous movement between l@ said connecting members and said drums.

ln testimony whereof I have signed my name to this speeication in the presence of two subscribing Witnesses.

PERCY L. BILLINGSLEY. Witnesses:

EDWARD SULLIVAN, NAN lELoEssoR. 

